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Solar PV Controller (Three-Phase)

Solar photovoltaic (PV) grid-following (GF) controller

Since R2024a

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  • Solar PV Controller (Three-Phase) block

Libraries:
Simscape / Electrical / Control / Renewables Control

Description

The Solar PV Controller (Three-Phase) block implements a photovoltaic (PV) grid-following (GF) controller that uses a maximum power point tracking (MPPT) algorithm.

The inputs to the block are the per-unit reactive power reference, the AC-side per-unit voltage and current, and the DC-side voltage and current in volts and amps, respectively. The outputs are the per-unit reference voltage wave for the solar inverter and a bus containing signals for visualization.

For discrete-time simulation, set Sample time (-1 for inherited) to a positive value or to -1 to inherit the sample time. For continuous-time simulation, set Sample time (-1 for inherited) to 0.

To choose the MPPT algorithm, in the MPPT tab, set the Algorithm parameter to one of these options:

  • Perturb and observe (P&O) — The P&O algorithm perturbs the operating voltage of the solar panel. The algorithm then observes the change in power output. If the power increases, the perturbation continues in the same direction. If the power decreases, the algorithm reverses the perturbation. To prioritize simulation speed, use this option.

  • Incremental conductance (INC) — The INC algorithm calculates the incremental change in current and voltage to determine the slope of the power-voltage curve. If the slope is positive, the operating point moves to a higher voltage. If the slope is negative, the operating point moves to a lower voltage. If the slope is close to zero, the maximum power point (MPP) is reached. To prioritize accuracy in tracking the MPP, use this option.

Visualization

The block outputs a bus containing these nine signals for visualization:

  • The estimated phase angle θ of the input voltage signal vabc.

  • The DC-side voltage Vdc in volts.

  • The per-unit q-axis current reference iq ref.

  • The per-unit d-axis current reference id ref.

  • The DC-side reference voltage Vdc ref in volts.

  • The per-unit d-axis voltage Vd.

  • The per-unit q-axis voltage Vq.

  • The per-unit d-axis current id.

  • The per-unit q-axis current iq.

Ports

Input

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Per-unit reactive power reference.

Data Types: single | double

DC-side current, in amps.

Data Types: single | double

DC-side voltage, in volts.

Data Types: single | double

AC-side per-unit voltage.

Data Types: single | double

AC-side per-unit current.

Data Types: single | double

Output

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Per-unit reference voltage wave.

Data Types: single | double

Bus containing internal signals for visualization. For a list of signals, see Visualization.

Data Types: single | double

Parameters

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To edit block parameters interactively, use the Property Inspector. From the Simulink® Toolstrip, on the Simulation tab, in the Prepare gallery, select Property Inspector.

General

AC filter inductance, in henry.

System frequency, in hertz.

The per-unit inverter current limit.

AC-side base impedance, in ohms.

AC-side base power in volt-amperes.

DC bus base voltage, in volts.

Time, in seconds, between consecutive block executions. During execution, the block produces outputs and, if appropriate, updates its internal state. For more information, see What Is Sample Time? and Specify Sample Time.

For discrete-time simulation:

  • To specify the sample time explicitly, set this parameter to a positive value. This value defines the sample time in seconds.

  • To inherit the sample time, set this parameter to -1.

For continuous-time simulation, set this parameter to 0.

For more information about continuous and discrete sample times, see Types of Sample Time.

MPPT

Maximum power point tracking algorithm. Choose one of these options:

  • Perturb and observe (P&O) — The P&O algorithm perturbs the operating voltage of the solar panel. The algorithm then observes the change in power output. If the power increases, the perturbation continues in the same direction. If the power decreases, the algorithm reverses the perturbation. To prioritize simulation speed, use this option.

  • Incremental conductance (INC) — The INC algorithm calculates the incremental change in current and voltage to determine the slope of the power-voltage curve. If the slope is close to zero, the MPP is reached. If the slope is positive, the operating point moves to a higher voltage. If the slope is negative, the operating moves to a lower voltage. To prioritize accuracy in tracking the maximum power point, use this option.

Initial voltage for the MPPT algorithm, in volts.

Voltage step of the MPPT algorithm, in volts.

Settling time of the MPPT algorithm, in seconds.

PLL

Proportional gain of the phase-locked loop.

Integral gain of the phase-locked loop.

Initial phase angle for the phase-locked loop, in degrees.

Voltage Controller

Proportional gain of the voltage controller.

Integral gain of the voltage controller.

Derivative gain of the voltage controller.

Current Controller

Proportional gain of the D-axis current controller.

Integral gain of the D-axis current controller.

Derivative gain of the D-axis current controller.

Proportional gain of the Q-axis current controller.

Integral gain of the Q-axis current controller.

Derivative gain of the Q-axis current controller.

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using Simulink® Coder™.

Version History

Introduced in R2024a

See Also